With almost 95 percent of the votes counted, the left-wing coalition was ahead of the main right-wing opposition, but both are expected to gain additional seats in the upper house.
The presidential election in Colombia will be held on May 31.
Left bloc set to become largest in Colombia's parliament, preliminary results show
Outgoing President Gustavo Petro's leftist coalition appears set to become the largest in Colombia's parliamentary elections, according to preliminary results.
Advertisement
What do you think?